Lesson 27 Typical Type of Tide Energy Device

Keywords and Expressions

Harness：利用

27.1　Tidal Energy

The power of the tide can be seen in this photograph. It shows people running for their lives from a powerful tidal wave which has crashed over a coastal/river wall (China 2000). If tidal power can be harnessed electricity can be produced in large quantities. The Earth is covered mainly by water. The seas as we call them， have currents and tides that circulate round the world. This vast amount of moving water produces immense amounts of energy. Countries like Britain that are surrounded by powerful seas and oceans are ideally placed to convert the energy of tides， sea currents and waves to produce electrical energy. The main problem in harnessing sea power is that it is not easy and usually means investment of large amounts of ......     （共3486字）    [阅读本文]>>